LiftMaster 8500WMC Manual Del Usuario página 34

Troubleshooting
Additional Troubleshooting (Continued)
by its springs. If it does not, disconnect the garage door opener and call a trained door systems technician.
The garage door opener motor hums briefly, then won't work:
• The garage door springs may be broken. See above.
• If the problem occurs on the first operation of the garage door opener, door may be locked. Disable the power door lock.
The garage door opener won't operate due to power failure:
• Manually open the power door lock.
• Use the emergency release handle to disconnect the door. The door can be opened and closed manually. When power is restored,
pull manual release a second time.
• When in Battery Backup mode, the opener should be able to operate up to 20 times.
• Disable any door locks. Use the emergency release handle to disconnect the door. The door can be opened and closed manually.
When power is restored, pull manual release a second time.
• When in battery backup mode, battery power will last for 30 hours or up to 20 cycles over a 24 hour period.
Door loses limits:
• Collar not tightened securely. Tighten collar and reprogram limits (see Adjustment Step 1).
The garage door opener moves when the door is in operation:
• Some minor movement is normal for this product. If it is excessive the collar will wear prematurely.
• Check to make sure the torsion bar is not moving left/right excessively.
• Check to make sure the torsion bar is not visibly moving up and down as it rotates.
• Check that the opener is mounted at a right angle to the jackshaft. If not, move the position of the mounting bracket.
Automatic door lock connector will not fit the door opener plug:
Older model 24V door locks are incompatible. Use automatic door lock model 841LM, see Accessories page
Automatic garage door lock does not activate when garage door opens or closes:
In battery backup mode, the automatic garage door lock will unlock when the garage door is opened, and will remain disabled until
power is restored.
The door opener is beeping:
• Indicates unattended closure. The opener has been activated by the myQ App or the Garage and Gate Monitor.
• A solid orange LED with beep, sounding approximately every 2 seconds, indicates the door opener is operating on battery power.
• A flashing orange LED with beep, sounding every 30 seconds, indicates the battery is low.
• A solid red LED with beep, sounding every 30 seconds, indicates the 12V battery will no longer hold a charge and needs to be
replaced.
The garage door is beeping and the red LED is flashing:
The battery charge is low or the battery is dead.
• Replace the battery.
myQ Smartphone Control, wireless myQ devices, and Timer-To-Close will not work:
• When in Battery Backup mode, myQ Smartphone Control, wireless myQ devices and Timer-To-Close will be disabled.
• myQ Remote LED Light must be installed to enable use of Timer-to-Close or myQ Smartphone Control of the door. Plug in
the myQ Remote LED Light and make sure it is programmed to the garage door opener. It may take up to 5 minutes to enable
Timer-to-Close and myQ Smartphone Control.
NOTICE: This device complies with part 15 of the FCC rules and Innovation, Science and Economic Development Canada license-exempt RSSs. Operation
is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
This device must be installed to ensure a minimum 20 cm (8 in.) distance is maintained between users/bystanders and device.
This device has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules and Industry Canada ICES
standard. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interfer-
ence to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
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